Locomotive boiler



Oct. 22, 1929. c, HAwLEY 1,732,304

LOCOMOTIVE BOILER Filed May 13. 1922 l 2 Sheets-Sheet 1 Oct. 22, 1929.c, Aw 1,732,304

LOCOMOTIVE BOILER I Filed May 13. 1922 2 Sheets-Sheet 2 I III.

Patented Oct. 22, 1929 FUNITED' STATES PATENT: OF

BOX COMIPANY, OF CHICAGO, ILLINOIS A CORPORATION OF DELAWARE LOCOMOTIVEBOILER.

Application filed May 13,

cause or set up a positive fore-and-aft circulation of the water in theboiler.

My invention comprises a locomotive firebox in combination with a hollowvertical water wall of inverted triangular form which hangs from thecrown sheet of the firebox and extends longitudinally in the fireboxfrom a position near the flue sheet thereof to a point near the back endor head of the firebox. To this wall I connect a plurality of waterfeeding tubes. These preferably extend from the side water legs of thefirebox to and into the bottom of the water wall. Said bottom of thewall is inclined upwardly and rearwardly and the connecting tubes, as agroup or groups, while in themselves substantially horizontal, conformto the inclination of the bottom of the water wall. Thereby the wall issupplied from numerous points in the side water legs from differentelevations therein.

An important incident of my invention is that these supply tubes areextended nearly to the outside shell or wrapper sheet of the firebox,

taking water therefrom rather than from the side sheets of the firebox,thus avoiding any confusion or congestion of water currents which mightoccasion difliculty with the side sheets stay-bolts. A furtherlll'lPOItZtl'ltlIlCldent of the invention is the combination, with thedescribed supply tubes, of a sectional firebrick arch for which saidtubes provide ideal supports.

The foregoing and other features of my in vention will be readilyunderstood on reference to the accompanying drawings, in which Fig. 1 isa-vertical cross section of a locomotive firebox of the narrow type;embodying my invention; Fig. 2 is a like view of a wide.

firebox. embodying my invention; Fig. 3 is a vertical longitudinalsection substantially on either of the lines 33 of Figs. 1 and 2; Fig. 4illustrates a modification of the invention wherein two vertical waterwalls are employed with a peculiar arrangement of the water supplytubes; Fig. 5 is a longitudinal 1922. Serial No. 560,661.

section thereof on either of the lines 5-5 or 5'-5 of Fig. 4;Fig. 6 is afurther modification of the invention; Fig. 7 is a vertical sectionthereof on the line 7'-7 of Fig. 6; Fig. 8 is a partial transversesection on the line 8-8 of Fig. 7; Fig. 9 is a transverse sectionshowing still another form of the invention; Fig. 10 is a sectionthereof on the line 1010 of Fig. 9 Fig. 11 is a horizontal sectionenlarged ,taken on any of the lines 11 of the several figures; Figs. 12and 13 are sectional details, showing different ways of securing thesupply tubes in the water walls.

I have herein shown fireboxes of different shapes or types in order thatit may be clearly understood that my invention is applicable to allthereof. All forms of the invention are much the same, notwithstandingslight modifications of shape. or assembly as between water wall and thewater feeding and arch supporting tubes. illustrated in Figs. 1, 2 and3, wherein A represents the hereinbefore mentioned hollow water Wall. Asshown in Fig. 3 this wall is stay-bolted throughout and is ofsubstantially triangular form. Itsfront end or edge A is set back farenough from the flue sheet 2 of the firebox to permit necessary work tobe done onthe flues of the boiler. The rear end of the wall A reachesalmost to the back sheet 3 of the firebox; thus a wall of large area issecured. Sufiicientfiring clearance 4 is allowed between the grate (notshown) and the lower end or inverted apex A of the wall. 'As shown inFigs. 1 and 2, the wall is positioned midway bet ween the side sheets 5,5, of the firebox. As suggested by the several figures, the tubes B(above mentioned) may be of various lengths and shapes. A plurality ofsuch tubes is provided on each side of the wall and each tube serves toconnect a side water leg 6 of the boiler with the interior or the waterwall- A. As well shown in Fig. 3 the tubes enter the wall close to theinclined bottom thereof. Hence, the series or groups The simplest formsare CHARLES GILBERT HAWLEY, 0F QHICAGO, ILLINOIS, ASSIGNOR TO LOGOMOTIVEFIRE- of tubes, as a whole, has the same, or substanv which, as wellknown, constitute a sectional fire arch or baflie of a form which ismost convenient and desirable.

As clearly shown, the outer ends of the tubes extend considerably beyondthe side sheets of the firebox and almost to the wrapper sheet or boilershell 7. Thus, the tubes and the water wall are caused to draw Waterfrom points adjacent the shell rather than from points adjacent the firesheets of the fire box. As well known, when the boiler is under firethere is a rapid rise of water adjacent each side sheet and concurrentlya well defined downward flow of cooler water adjacent outer or wrap persheets 7. It is this cooler supply which is taken into the water wallthrough the connecting tubes B. By this simple expedient I avoid allpossibility of interference or congested water or steam pockets upon theside sheets; and thus avoid all difliculty'with the side sheets and themany stay-bolts therein.

In Figs. i and 5 I have illustrated two of the water walls D, D, with apeculiar set of connecting tubes which serve to support the arch brick Cand by which each water wall is supplied with water from both water legsof the boiler. In this arrangement the lower tubes E areindividual torespective walls D. From that point upward the tubes are alternatelyindividual, first to one and then to the other of the walls, thus thetube D extends from the side water leg 12 to the left-hand water wall D;the tube D extends from the lefthand water leg 12 to the left-hand waterwall D. This condition is reversed as to the next set of tubes D and Dwhich are joined to the right-hand water wall D. An incident of thisconstruction and one of very considerable importance is depicted in Fig.5, to wit, the arch as a whole is deeply corrugated by many andvariously positioned pockets 13. Such an arch serves to thoroughly admixthe gaseous combustibles which flow upward and rearward from the fuelbed, following the direction of the arrOWSlt in Fig. 5. This positiveadmixing effect of the arch is also to be observed from Figs. 1, 2 and3, wherein the arches may be regarded as being composed of the tubes andfirebrick, also as shown.

Fig. 6 is like unto Fig. 4, but comprehends only individual row orseries of tubes F for each water wall G. These tubes support firebrick15 as shown in Fig. 7, the same constituting the desired arches'in theside passages. The middle passage, namely the space between the twowalls G, is occupied by a middle row of firebrick H, which may besupported from studs 16 projecting from the walls G.

The structure of Figs. 9 and 10 differs from the others in that only onelargewater tube I is employed for the one or more water walls J. Thistube, as shown in Fig. 9, may extend from side toside of the firebox, inwhich case it should be applied thereto through the medium of thediaphragm plates 17 Or the bolt 19, extending from the inner side of thewater wall to the shell of the boiler. The structure of Fig. 8 is alsoappropriate to one or all of the tubes of Figs. 6 and 7.

the structure of the water wall, are self-explanatory. Wallis'marked 20,the supply tubes are marked 21 and the stay-bolts of. the wall aremarked 22.

. Various modifications of my invention will readily suggest themselvesto one who is skilled in the art, and therefore I do not limit theinvention to the precise shapes, constructions and combination of partsherein shown.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

In combination with a locomotive boiler having a firebox including acrown sheet and side sheets, a flat tubular water wall arrangedlongitudinally of the firebox and depending from and opening through thecrown sheetthereof, said water wall having an upwardly In each of thesefigures the water The detailed Figs. 11, 12 and 13 illustrating I andrcarwa'rdly inclined bottom wall, and a

